Odpowiedzi

2010-02-15T20:26:44+01:00
3x = (x+7):2 |×2
6x = x+7
6x - x = 7
5x = 7 |:5
x = 7:5
x = 1 ²/₅
x = 1,4
1 1 1
2010-02-15T20:28:25+01:00
3x = ½ (x+7)
3x = ½x + 3,5
2,5x = 3,5
x = 1,4
2010-02-15T20:28:35+01:00
3x = 1/2 (x + 7)
3x = 1/2 x + 3,5
3x - 1/2 x = 3,5
2,5x = 3,5 / : 2,5
x = 1,4